Fuse.



CGP?

H, SMITH.

FUSE.

APLICATION FILED MAR-2. 19H

l 26 6 3 6 Pwente Apr. 2, 198.

INVENTOR WITNES LZGLGSG.

Sgeeication of Letters 'Batent ripiani?,

Application filed March F4, 1517. life. 152,581.

To all whom t may concern."

4Be it known that l, RAY SMITH, a citizen of the United States, residing at i ayton, in the county of ll/lontgomery and State el Ohio, have invented new and useful ,iniprovements in Fuses, oi? which the iiollowing a speciticrtion.

This invention relates to improvements in mutiple fuses for electric circuits.

T he objects of this invention are to provide a multiple :fuse wherein the inse clements may be readily replaced; and to provide in such a` fuse for the utilization ot fuse elements having a portion whereon the eapacity o'f 'the elements may be conveniently indicated, and further to render impossible the use in this plug ot inse elements not i manufactured especially therefor.

lVith these and other objects in view which will appear upon examination of* the. accompanying drawings, speciiication and claims, l have embodied my invention in the, forni shown and described therein.

ln the drawings7 Figure l is a side view showing the exterior 01"' the fuse.

Fig. 2 is a sectional side view oit the luse.

Fig. 3 is an end view of the fuse with cap removed. v

Fig. el is an end view orp the opposite extremity oit the fuse-containing body.

Fig. 5 is an end view of the plug lerne ling a portion ot' the fuse showing the end adapted to be mounted adjacent to said body.

Fig. 6 is a detailed view of one means for securing the replaceable fuse elements in position.

Referring now to the drawings in detail, 1 is a plug ot insulating inateriah having se cured thereto a brass collar with threads adapted to engage those.. ot the vfuse receptacle. Collar 2 is connected by a suitable conductor with a spring actuated pin 3, protruding trom the opposite end of the plug and olheenter-thereo't. At the end ot the plug where the pin is inserted is an eula rged cylindrical portion 9 around the cireuniterenee whereof is located a plurality ci spaced notches d. Cent-rally located and longitudinally extending through said plug is bore or hole 5, having a counter-bore or enlargement 6 at the end of the plug intended for insertion in a fuse receptacle.

` Adjacent io the pin end o" cylindrical body 7 of insulati.

serving the purpose oit a tuse magaziiiie. the plug end oj said bod is a circular recess S, adapted to re :,eirethe cylindrical portion 9 of the plug l and having suitably disposed around the wall of said recess a j ilurality ot longitudinal ridges l() adapted to engage the notches in cflinl'lrical portion t?. {entrallr positioned and longitudinally extending through boey 7 is a. bore ll. Concentrically disposed with relation thereto an annulaiseries or' longitudinal bores l2. having at the plug end ot said body counterbores or en larged portions ll into these bores are inserted the t inlaeeable 'ruse elements ist, l. a

ingheads l5 oi" suitable size and shape igor insertion in the counter-bores 13, the fusible portions att-ached thereto extending through bores l2 into a recess 'T at the opposite end of the body. ln each ott the heads 15 is a depri sion i8, adapted to receive the pin 3 on plug l.

The Yfusible portions pro jectine' into recess 1T are bent p: rallel to the inner ce of said recess and securely clamped thereto by a ein cular plate i9 about the circunilierence of which are spaced notches 20 adapted to coincide with the longitudinal ridges' El cori responding to the ridges 10 in recess 8. fientrally positioned in plate l) is a hole l2,A having threads therein adapted to the threads atI the extremity oit a sci w shank .23 ct conducting material, ntending through bore 'l1 in body T and bore 5 in plug l, and at the extremity adjacent to said plug the shank has a head 2i adapted to establish connection with a central electrode ot tuse receptacle, and .{urther serving the purpose ot' retaining in position a spring 25, situated in counter-bore G in said pl said spring maintaining body 7 in Contact with plug i.

In Contact with plate l5) is a similar plate having however, an enlarged hole .in the center which is not provided with screw threads. Plate 2G is provided with notches similar to those onlplate 19 and also eng-ig ing the longitudinal ridges 2l. A heliea compression spring 27 is maintained in posi tion against plate 26 by a cap Q8 of insulat ing material provided with Screw threads by which it securely attached to similar threads around the outer end or" body 7.

ein the above description it will be e; is

fili iiiicluded .in a c fuse receptacle ni winch this i" CII inserted. VUpon one ot the fuses becoming burnt out, it is merely necessary to withdraw body 7 against the tension of spring 25 until the ridges 10 no longer engage notches Al. Upon a slight rotation of body 7, ridges l0 will again register' with the notches in a different position, thereby enabling pin 3 to establish contact with an undamaged fuse element. Upon all of the fuse elements in body 7 having been used, the screw shank 23 is withdrawn from the bore by means of the slot in the head thereof adapted to receive a screw-driver, thereby permitting the separation of the body and plug. Cap 28 now being unscrewed, spring 27 and plates 2G and 19 may be removed, thereby permitting ready insertion of a new set of fuse elements.

For certain purposes I may construct body 7 of insulating material, capable of being shaped in a die, and in this connection may utilize the construction shown in Fig. G,- wherein the enlargements 13 of bores l2 in body 7 are provided with metal pockets lrnurled or otherwise roughened outside, and which may be incorporated in said body when shaped in said die. These pockets are provided with screw threads in the inside thereof, adapted to engage similar threads which I may place on the heads l5 of the fuse elements 14, these heads in this instance being provided with a slot whereby they may vbe readily inserted in or removed fromI said pockets, thereby providing an extremely secure method of securing the replaceable elements in position.

It is well known to those having occasion to use replaceable fuses, that the fusible wires constituting fuses of diiferent capacity, as ordinarily constructed, are exceedingly diflicult to distinguish one from' another.

The above drawings and specification dcscribe a preferredl form of my invention for purposes of illustration, but I wish it to be understood` that said drawings and specification are not to be interpreted as in any way limiting the scope of my invention; as many other embodiments may be constructed without departing from the spirit or scope thereof.

What I claim is:

l. In a device of the class described, the combination with a relatively xed plug having an olf-center spring-pressed pin, a

Leonesa relatively rotatable body having an annular series of bores adapted to be brought suecessively into register with the pin and a recess in its outer end, and a cap removably closing said recess; of fuses in said bores and having their outer ends extending into said recess, a plate overlying such ends, expansive means between it and -the cap, a screw passing axially through said plug and body and threaded into the plate, the head. of the screw forming a central terminal, and a collar on the plug connected with the pin and forming the other terminal.

2. In a device of the class described, the combination with a relatively fixed plug having an axial hole counter-bored at its outer end, an olf-center pin in said plug, a. relatively rotatable body coaxial with the plug and having a series of olf-center bores adapted to be brought successively into register with the pin, fuses in said bores having heads at their inner ends to contact with said pin, and a plate at the outer end of the body overlying the outer end of said fuses; of an expansive spring in the counter-bore of the plug, a screw passing there-- through and through the axis of the body and removably engaging said plate, the head of the screw forming the central terminal of the device, and a collar on the plug connected with the pin and forming the other terminal.

In a device of the class described, the

, combination with the stationary element of the device and the revoluble body formed at one end with a ridged recess and further vformed with a plurality of fuse-holding bores opening into said recess, of fuse elements seated in said bores and having bent ends projecting into said recess, a conducting'plate seated in said recess against said ends ot' the fuse elements, said plate formed centrally with a screw threaded opening and formed with notches ior engaging with said ridges of the recess, a shank extending through said stationary element and said body and having screw threaded engagement in said opening, a cap screw threaded on the body over said recess, and a spring in said recess bearing against said cap and said plate.

In testimony whereof I atlix my signature.

RAY sMrrH. 

